According to the studies, people spend 90% of their life indoors and the amount of the harmfull gases in the buildings is higher than outdoor city pollution. They can cause diseases such as cancer, asthma, allergic reactions and much more. Building materials play a very important role to create ecologically and sustainably healthy environment. In order to construct a sustainable building which is friendly with the human and the environment, the building materials have to be chosen accordingly. The purpose of this study is to select the healthiest materials for the buildings, and to reduce indoor air pollution.